Full write up on them on Fishtanktv com. Great filters, last forever. Solid design.<br />Thanks for checking out my Whisper Hang on back Filters videos. If you like what you see or hear rate this video or add a comment. Ask me questions. For more video, Live chat and custom user profiles to show off your planted tanks planted, reef or other fishtanks, check out www.fishtanktv.com
